Ratchet mechanism.



P. N. SHRNE.

' BATCHET MECHANISM.

APPLICATION FILED MAY 13. IQIB.

1,282,718.. Patented 0011.22, 1918.

5% WWW wo w alike W 1 To all whom it may concern:

PETER N. SHINE, OF DETROIT, MICHIGAN,

AssIeNon or ONE-HALF 'ro vmcnnr BRUKLER, on DETROIT, MICHIGAN.

BATCHET MECHANISM.

Patented Uct. 22, 1912..

Application filed May 13, 1918. Serial No. 234,126.

Be it known that I, PETER N. SHINE, a

a subject of the King of Hungary, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Ratchet Mechanism,

' of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to ratchet-mechanism, and aims to provide a mechanlsm that may be advantageously used for rasing and lowering a load, wherein the load is moved by a cable or flexible connection attached to a .dru'm 'and adapted to wind-and unwind relative thereto. Thel' ratchet mechanism has been'designed for intermittently rotating the drum in either direction and safely control the movement of the load.

I attain the" above results by a durable and mechanical construction which will'be hereinafter described and then claimed, and reference will now be had to the drawing, wherein i o Figure 1 is aside elevation of the ratchet mechanism, partly broken away and partly in section, and z a Fig. 2 is a plan of the same partly broken "away and partly in section.

In the drawingythe reference numeral 1 denotes a "suitable support and connected thereto byabolt 2 anda nut 3 is a frame 4 that maybe held againstrotation by one or' more screws 5 connecting the frame 4 to the supporttlyadjacent the bolt 2.

Rotatable on the bolt 2. within the frame .4, is a drum or flanged wheel? 6 having a ratchet wheel 7 at one sidethereof and a notched wheel 8 at the opposite'sid'e-with all of said wheel either integrally formed or connected for rotationtogether.

- 1 Loose on the bolt 2, in the frame 4 are the-side arms 9 of a forked orbifurcated member 10 which is held by screws or other 13 for plungers 14 and 15. the plunger14 V being adapted toengage' theratchet wheel 7 and the plunger 15 the notched wheel 8. Both of said plungers are-encircled by coiled compression springs 16 within the plunger Ways 13, and the inner ends of said plungers similar to the locking member 18. spring pressed detent 30 is adapted to eningthe plungers 14 and 15 in retracted positions, and said locking member is cut away, as at 19, so as to provide clearance for the inner end of either plunger, depending upon the position of the rotatable locking mem ber. This member is held against displace ment by a small screw 20 having its, head extending into an annular groove 21 in the locking member 18, and said lockingmember has a cross rod or handle 22 to facilitate rotat10n. 23 and 24, the former supporting a pivoted spring pressed dog that normally engages the ratchet wheel 7 and prevents a clockwise movement of the same, as shown in Fig. 1. The spring pressed dog 25 has a finger piece 26 so that said dog may be shifted out of engagement with the ratchet wheel.

The extension 24 supports a spring pressed pivoted trip member 27 that is adjacent the notched wheel 8 and is adapted to engage in an opening or recess 28 in the end of the plunger 15 and automatically shift said plunger out of engagement with the notched wheel 8.

. On the side of'tl ie frame 4 is a housing 29 for a spring pressed detent 30 adapted to be locked in a retracted position by a locking member 31. in the housing 29 and The gage in a-notch of the wheel Sand said detent and the plunger 15 are beveled so-that the detent may enter the same notch in which the plunger engages and gradually replace said plunger. To retract the spring Qpressed detent 30 at predetermined t1mes,

the side of the member 10 has a cam 33 that may beshiftedin and out of a slot 34 in the h0l1S1ng29, so asto engage and disengage the detent 30. l

A cable 35 has been shown as attached to the drum 6 and assuming that the cable sustains a load that is to be raised or lowered, the" operation of raising the load by the ratchet mechanism, is a follows:

" The lockingmembers 18 and 31 are a The frame 4 has two extensions" justed to hold the plunger 15 and the detent 30 retracted, with the plunger 14 free to engage the ratchet wheel 7. The handle or lever 12 is then swung to the right, considering Fig. 1, the plunger 14: receding over the teeth of the ratchet wheel to obtain a fresh grip and then by swinging the'lever 12 back again, to the left, the ratchet wheel 7 is par-f tially rotated, also the drum 6,'causing the cable 37 to be wound on the drum. The spring pressed dog 25 will hold the ratchet wheel until another grip is obtained, and during the oscillatory movements of the handle or lever 12, the strokes of the handle .or lever are limited by the extension 23 and 24 of the frame 4.

During this operation, the cam 33 may enter the slot 34 of the housing 29, but nothing is accomplished thereby.

Assuming that the cable 35 has been wound upon the drum and it is now desired to lower the load, the locking member 31 is shifted to release the detent 30, so that said detent may engage in one of the notches of the wheel 8. The locking member 18 is also shifted to hold the plunger 14 in a retracted position and release the plunger 15, it being necessary to release the detent 3O first of all so that the drum 6 will be prevented from accidentally rotating.

With the detent 30 holding the notched wheel 8 against accidental rotation, the handle or lever 12 is swung, as before, so that the end of the plunger 15, which engages in a notch of the wheel 8, may rotate the wheel clockwise. As the handleor lever 12 is swung, the cam 33 moves out of the housing 29 and releases the detent 30, so that said detent may immediately engage in'the notch of the wheel *8 as soon as the stroke of the handle or lever '12 has been completed. Now, when the handle or lever 12 is retracted so that the plunger 15 may obtain a fresh grip on the notched wheel 8, the cam 33 enters the slot 34: of th housing 29 and retracts the detent 30. As the detent leaves the notch of the wheel 8, the plunger 15 immediately enters the same and the notched wheel'may be again partially rotated in a clockwise manner. It will be noted that at the end of veach operating stroke of the handle or lever 12, that ,the trip member 27 shifts the plunger 15 out of engagement with the notched wheel8, so that the handle or lever may be retracted. in this manner, the

rdetentiiiO and the plunger 15 cooperate in permittmg the cable 29 to be intermittently unwound from thedrum 6, and the plunger 14: cooperates with the dog 25 permitting of the cable 35 being wound on the drum. It is therefore possible. to manipulate extremely heavy loads with the ratchet mechanism,

without any danger ofany part thereof slipp s l a r One embodiment of my invention has been illustrated, butit is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claims.

, What I claim is 1. A ratchet mechanism comprising a frame, a revoluble drum in said frame and to which a cable is adapted to be attached and woundand unwound relative to said drum, a ratchet wheel at one side of said drum, a notched wheel at the opposite side of said a drum, a handle oscillatory relative to said drum, a dog carried by said frame and nor mally engaging said ratchet wheel, a plunger carried bysaid handle and adapted to cooperate with said dog in partially rotating said drum, a detent carried by said frame adapted to engage said notched wheel, aplunger carried by said handleadapted to engage said notched wheel, and means carried by said handle adapted to engagesaid detent and retain said detent in a retracted position during the partial rotation of said notched wheel by the plunger of said handle.

2. A ratchet mechanism comprising a frame, a revoluble drum therein, a ratchet wheel at one side of said drum, a notched '3. A ratchet mechanism. comprising a frame, a revoluble drum in said frame, a

ratchet wheel at one side of said drum, a

notched wheel at the opposite side of said drum, a handle oscillatory relative to said drum, a plunger in said handle adapted to engage said ratchet wheel and movesaid drum counterclockwise, a plunger insaid handle adapted to engage said notched wheel and move said wheel clockwise, means carried by said frame adapted to hold said notched wheel while the plunger of said handle engages said notched wheel, means carried by-said frame. adapted to automatically move the plunger out of engagement with said notched wheel, and means carried by said handlev adapted to-hold said plungers inretracted position so that said drum may freely revolve.

i 4. A ratchet mechanism. comprising a" frame, a revoluble drum in said frame,"- a notched wheel at oneside of said drum, a handle oscillatory relative to said drum, means carried by said handle for moving said drum counterclockwise, a plungercarried by said handle adapted to engage said notched wheel and rotate said drum'clockwise, and means carried by said frame adapted to hold said notched wheel while said tions, and means carried by said frame plunger obtains a fresh grip thereon. adapted for holding said ratchet wheel and 5. A ratchet mechanism comprising a said notched wheel While the first mentioned frame, a drum revoluble in said frame, a means is obtaining a fresh rip. 5 ratchet Wheel at one side of said drum, a In testimony whereof I ax my signature notched Wheel at the opposite side of said in the presence of two witnesses. drum, a handle oscillatory relative to said drum, means carried by said handle and PETER SHINE adapted to engage said ratchet Wheel and Witnesses:

10 said notched wheel so that said drum may be VINCENT BRUKLER, intermittently rotated in opposite direc- KARL H. BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

